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Power Strokes
6.4 Aftermarket
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[QUOTE="Jeff@Spartan, post: 227067, member: 223"] Okay, let's say (hypothetically) you are at 2200 RPM, 55 MPH, and 28 psi of boost. If desired back pressure is reading 34 psi, that is what back pressure SHOULD be. Absolute back pressure is what back pressure actually is + barometric pressure. Sometimes desired back pressure and absolute back pressure are in correlation with each other. Sometimes they aren't. I honestly don't know what better way to explain it. Maybe Dustin can explain it better than me. He and I have discussed this before. [/QUOTE]
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